Synthesis and characterization of vanadium oxidecatalysts supported on copper orthophosphates

Synthesis of a pure copper orthophosphate (CuP) prepared by Coprecipitation, and CuP modified by impregnation of vanadium (2-12 wt % of V₂O₅) have been carried out. The solids obtained were investigated as synthesized or after calcination by various physico-chemical techniques such as X-Ray Diffraction (XRD), Infrared Spectroscopy (IR), Thermogravimetric analysis (TGA), and differential thermal analysis (DTA). The results revealed that the solids V/CuP consisted of copper orthophosphate Cu₃(PO₄)₂ as major phases, together with V₂O₅ as minor phase. The diffraction lines of V₂O₅ increase by increasing the vanadium content. (paper)